The Northern Uí Néill was any of several dynasties in north-western medieval Ireland that claimed descent from a common ancestor, Niall of the Nine Hostages. Other dynasties in central and eastern Ire
Exterior view of Grianan of Aileach situated in County Donegal, Republic of Ireland; the royal fort of the over-kingdom of the Northern Uí Néill; 55°01′24″N 7°25′43″W / 55.023386°N 7.428509°W / 55.023386; -7.428509.
The Grianán of Aileach, sometimes anglicised as Greenan Ely or, locally, as Greenan Fort, is a hillfort atop the 244 metres high Greenan Mountain at Burt on the Inishowen Peninsula in County Donegal,
Northern Uí Néill
…name of which survives today as the name of the Inishowen peninsula. Their king was styled as rí Ailig, the 'king of Ailech', with their base being the Grianan of Aileach at the entrance of the Inishowen peninsula. The Cenél Conaill and Cenél nEógain are assumed to have established lordship over their neighbouring local…